We tested alternators, engine driven fans, and other accessories on the dyno years ago and I can tell you that most of the accessories on the front of your engine take very little power to turn under most circumstances. Sure, under extreme loads maybe your alternator takes a bit more power. And under extreme loads maybe your power steering pump uses more power, but in the grand scheme of things, none of those accessories really suck up that much. But what about that engine driven fan?
If you have ever had one of those pinwheels on a stick that you got at an amusement park, and have swung them around trying to get the most speed out of them, you know that when you push it through the air fast you can feel the physical load on the stick through your hand and arm. That’s because it takes some force to spin those things, especially at big speed where it will load the fan blades the most. So it should come as no surprise that they do take some horsepower to spin. Some applications claim 10-12 horsepower when converting from an engine driven fan to an electric. But what is reality? And does the kind of mechanical fan matter?
Check it out in the dyno video below to see if you can guess how much it really takes.
Video Description:
Today we dyno test water pump driven mechanical engine cooling fans. How much horsepower do they sacrifice from your engine ? We test stock oem style 4 blade steel fan, plastic flex fan, and a Gorsuch FC-10000 racing fan. Dirt and asphalt circle track racers will want to see this.
The post How Much Horsepower Does An Engine Driven Cooling Fan Really Take From Your Engine? appeared first on BangShift.com.
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